docs: def do_visualize(self, line):
          """Visualize an ontology - ie wrapper for export command"""
  
          if not self.current:
              self._help_noontology()
              return
  
          line = line.split()
  
          try:
              # from ..viz.builder import action_visualize
              from ..ontodocs.builder import action_visualize
          except:
              self._print("This command requires the ontodocs package: `pip install ontodocs`")
              return
  
          import webbrowser
          url = action_visualize(args=self.current['file'], fromshell=True)
          if url:
              webbrowser.open(url)
          return